Evaluation of Safety Instrumented System in a petrochemical plant using HAZOP-LOPA-Fault Tree Methodology : Case Study: Naphta Stabilizer-A Reflux Drum (LPG separation) in RA1K

The purpose of this work is to check the calculations to consolidate the safety instrumented system (SIS) of Naphta Stabilizer-B Reflux Drum in skikda refinery using HAZOP-LOPA-Fault Tree methodology. The aim of this paper is to verify that the intended safety integrity level of a safety instrumented system is achieved. Otherwise propose a solution to ameliorate the safety instrumented system to mitigate the studied scenario.